As for such shortcomings as big conduction loss

weak pressure and thermal resistance

large volume and high cost etc of the reactive power compensation device in the thyristor switched capacitor

in this paper

a kind of reactive power compensation device taking ARM7 feature as control core and for complex use of permanent magnet vacuum switch and magnetic latching relay

and zero point capture of thyristor voltage is achieved ingeniously with optocoupler feature as base. It is shown by the practice that the device can achieve the impulse current within 2 times of rated current in switching capacitor

with such features as conduction loss and no external addition of radiator. The reactive power compensation device has such features as high reliability

stable performance and broad application prospects.